SEC Form 4 · STOCK Act
Insider buys that paid off for the people who copied them.
ZeroStack Corp.
Michael Heinrich, Executive Chair, bought $3.5M. Filed Jul 20, 6:31 PM ET.
$1,000 copied at the first price after the filing (Jul 21 open, $1.66) was $3,060 30 trading days later.
Example. Of 339 buys of $100K or more filed Jun 29 to Sep 11, the median lost 5.3% and 67.8% lost money over the same 30 trading days. Not investment advice.
Officers and directors must report their own stock purchases within two business days. We list every one, largest first, with what copying it would have returned.
A free account keeps a watchlist. No password: we email you a link.
PDF SOLUTIONS INC
Andrzej Strojwas · Chief Technology Officer
PDF SOLUTIONS INC
Shuo Zhang · Director
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
John Kachig Kibarian · President and CEO
Pdf Solutions Inc
Shuo Zhang · Director
Pdf Solutions Inc
Adnan Raza · EVP, FINANCE, CFO
Pdf Solutions Inc
Ye Jane Li · Director
Pdf Solutions Inc
Joseph R Bronson · Director
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
Nancy Erba · Director
Pdf Solutions Inc
Shuo Zhang · Director
Pdf Solutions Inc
Andrzej Strojwas · CTO
Pdf Solutions Inc
Adnan Raza · EVP, FINANCE, CFO
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
Joseph R Bronson · Director
Pdf Solutions Inc
Andrzej Strojwas · CTO
Pdf Solutions Inc
Adnan Raza · EVP, FINANCE, CFO
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
Shuo Zhang · Director
Pdf Solutions Inc
Adnan Raza · EVP, FINANCE, CFO
Pdf Solutions Inc
Adnan Raza · EVP, FINANCE, CFO
Pdf Solutions Inc
Shuo Zhang · Director
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
Gerald Zheyao Yin · Director
Pdf Solutions Inc
Michael B Gustafson · Director
Pdf Solutions Inc
Lucio Lanza · Director
Pdf Solutions Inc
Lucio Lanza · Director
Pdf Solutions Inc
Lucio Lanza · Director
Pdf Solutions Inc
Lucio Lanza · Director
Pdf Solutions Inc
Gregory C Walker · CFO, VP Finance
Pdf Solutions Inc
Lucio Lanza · Director
Pdf Solutions Inc
Kwangh Kim · VP of Business Development
Pdf Solutions Inc
Kwangh Kim · VP of Business Development
Pdf Solutions Inc
Gregory C Walker · CFO, VP Finance
Pdf Solutions Inc
Gregory C Walker · CFO, VP Finance
Pdf Solutions Inc
Gregory C Walker · CFO, VP Finance
Pdf Solutions Inc
Cornelis Hartgring · VP, CSS
Pdf Solutions Inc
R Stephen Heinrichs · Director
Filings come from SEC EDGAR within a minute of the SEC accepting them. Without Pro, each one unlocks 4 hours later. Not investment advice.
Questions
Where does the data come from?
Corporate insider trades come straight from SEC Form 4 filings, pulled from EDGAR within a minute of each filing. Congress trades come from STOCK Act disclosures. All of it is public and free to browse here, and Pro sees the newest filings first.
How often is it updated?
Every minute from 6 AM to 10 PM New York time on weekdays, the hours the SEC accepts filings. Pro sees each filing as it lands. Without Pro, a filing unlocks 4 hours after the SEC accepts it.
Is following insider trades legal?
Yes. Insiders are legally required to disclose their trades within a few days. Acting on those public disclosures is completely legal. Trading on private, non-public information is illegal, but that's a different thing.
What does the iPhone app add?
We're building an iPhone app that alerts you to new filings and, if you choose, copies a buy into your own brokerage after you approve it. It isn't out yet, and the waitlist is free.